public override void OnInspectorGUI()
{
GetTerrainHeightNormalMap = new SerializedObject(target);
GetTerrainHeightNormalMap script = (GetTerrainHeightNormalMap)target;
script.GetTerData();
savePathTerrainHeightNormalMap = GetTerrainHeightNormalMap.FindProperty("savePathTerrainHeightNormalMap");
if (GUILayout.Button("Get Height Normal Map"))
{
CreateTerrainHeightNormal();
}
GetTerrainHeightNormalMap.ApplyModifiedProperties();
}
void CreateTerrainHeightNormal()
{
GetTerrainHeightNormalMap script = (GetTerrainHeightNormalMap)target;
TerrainData targetTerrainData = script.targetTerrainData;
Texture2D tempTex = new Texture2D(targetTerrainData.heightmapResolution, targetTerrainData.heightmapResolution, TextureFormat.RGBA32, false, true);
Color32[] cols = new Color32[tempTex.width * tempTex.height];
for (int x = 0; x < tempTex.width; x++)
{
for (int y = 0; y < tempTex.height; y++)
{
// Bring x and y into the 0-1 Range used by GetInterpolatedHeight
float sample_xpos = 1.0f * x / (tempTex.width - 1);
float sample_ypos = 1.0f * y / (tempTex.height - 1);
// Get and encode height
float height = targetTerrainData.GetInterpolatedHeight(sample_xpos, sample_ypos) / targetTerrainData.size.y;
// Encoding/decoding [0..1) floats into 8 bit/channel RG. Note that 1.0 will not be encoded properly.
int height0 = Mathf.FloorToInt(height * 255.0f);
int height1 = Mathf.FloorToInt((height * 255.0f - height0) * 255.0f);
// Get normal
Vector3 normal = targetTerrainData.GetInterpolatedNormal(sample_xpos, sample_ypos);
float normal_x = (normal.x * 0.5f + 0.5f) * 255.0f;
float normal_z = (normal.z * 0.5f + 0.5f) * 255.0f;
cols[x + y * tempTex.width] = new Color32((byte)height0, (byte)height1, (byte)normal_x, (byte)normal_z);
}
}
tempTex.SetPixels32(cols);
tempTex.Apply(false);
string directory;
string file = "Terrain Height Normal Map";
if (savePathTerrainHeightNormalMap.stringValue == "")
{
directory = Application.dataPath;
}
else
{
directory = Path.GetDirectoryName(savePathTerrainHeightNormalMap.stringValue);
file = Path.GetFileNameWithoutExtension(savePathTerrainHeightNormalMap.stringValue);
}
string filePath = EditorUtility.SaveFilePanel("Save Terrain Height Normal Map", directory, file, "png");
if (!string.IsNullOrEmpty(filePath))
{
filePath = FileUtil.GetProjectRelativePath(filePath);
savePathTerrainHeightNormalMap.stringValue = filePath;
byte[] bytes = tempTex.EncodeToPNG();
System.IO.File.WriteAllBytes(filePath, bytes);
AssetDatabase.Refresh();
TextureImporter ti = AssetImporter.GetAtPath(filePath) as TextureImporter;
ti.textureCompression = TextureImporterCompression.Uncompressed;
ti.sRGBTexture = false;
ti.wrapMode = TextureWrapMode.Clamp;
ti.mipmapEnabled = false;
ti.npotScale = TextureImporterNPOTScale.None;
AssetDatabase.ImportAsset(filePath, ImportAssetOptions.ForceUpdate);
AssetDatabase.Refresh();
}
DestroyImmediate(tempTex);
}
